Prof. Ian F. Akyildiz
Scientific Advisory Board for ARRC
6th December 2023, 3:00pm - 4:00pm (GST)
Meeting Room: Auditorium 1, Masdar Office
| Title: | Multihop Routing based on Wireless Channel Effects for Outdoor Communication in THz Band |
| Abstract: | The development of multi-hop communication in the Terahertz (THz) band presents a promising approach to meet the increasing demand for high-speed wireless transmission for next generation (6G) wireless communication systems. The THz frequency range, lying between the microwave and infrared frequencies, offers bandwidth which is orders of magnitude larger than the bandwidth available in the traditional radio frequency range. Such high bandwidth allows for the transmission of large amounts of data in a short amount of time. Related to the high bandwidth, THz communication benefits from its ability to employ transmit pulses of very short durations, in the order of femtoseconds. Therefore, a single THz channel can potentially support data rates in the order of Terabit per second. However, significant challenges must be overcome to realize the full potential of THz communication, for example, limitations related to molecular absorption effects. The high frequency of THz waves makes them particularly susceptible to absorption by water vapor and oxygen molecules in the atmosphere. Therefore, accurate outdoor channel modeling that considers the molecular absorption and spreading losses in the THz band is crucial to design effective multi-hop communication systems which can address the range limitation of THz communication. Multi-hop communication involves the use of intermediate nodes or relays to transmit data between the source and destination. However, the relaying strategy (amplify-and-forward, decode-and-forward, etc.) and routing of data through the network must be carefully optimized to minimize latency and ensure an efficient usage of network resources. A joint optimization of routing metrics, such as hop count, signal strength, and interference, involving the current conditions of the time-variant THz channel will be attempted to achieve this goal. To summarize, this talk focuses on the fundamental physical layer modeling of outdoor multihop communications in the THz band and corresponding system optimization. A comprehensive quantitative modeling and analysis is necessary to evaluate the system performance and demonstrate the performance improvement of multi-hop transmission compared to the conventional single-hop case. Addressing these challenges may pave the way for the widespread deployment of THz multi-hop communication systems. |
| Bio: | I.F. Akyildiz (Life Fellow, IEEE and Fellow of ACM) received the B.S., M.S., and Ph.D. degrees in Electrical and Computer Engineering from the University of Erlangen–Nürnberg, Germany, in 1978, 1981, and 1984, respectively. He served as the Ken Byers Chair Professor in Telecommunications, the Past Chair of the Telecom Group at the ECE, and the Director of the Broadband Wireless Networking Laboratory, Georgia Institute of Technology, from 1985 to 2020. He serves on the Advisory Board of the Technology Innovation Institute (TII) Abu Dhabi, United Arab Emirates, since June 2020. He is the Founder and President of the Truva Inc, a consulting company based in Atlanta, GA, USA) since 1989. He is the Founder and the Editor-in-Chief of the newly established of International Telecommunication Union Journal on Future and Evolving Technologies (ITU J-FET) since August 2020. Currently he is an Adjunct Professor with the University of Helsinki, Finland and University of Iceland since 2020. He had many other international affiliations during his career and established research centers in Spain, South Africa, Finland, Saudi Arabia, Russia and India. Dr. Akyildiz is an IEEE Fellow since 1996, and ACM Fellow since 1997. He received numerous awards from IEEE, ACM, and other professional organizations, including ACM Sigmobile Award (2003), Humboldt Award (2014-2016 and 2023) from Germany and Tubitak Award (2011) from Turkey. In September 2023, according to Google Scholar his h-index is 137 and the total number of citations to his articles is more than 143+K. His current research interests include Mulsemedia Communication, Networking 2030, Metaverse, Hologram and Extended Reality Communication, 6G/7G wireless systems, TeraHertz Communication, Underwater Communication. |